SNVU948 July   2025 LM51770

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Connector, Test Point, and Selection Switch Descriptions
      1. 2.1.1 Connector Descriptions
      2. 2.1.2 Jumper Descriptions
      3. 2.1.3 Test Point Descriptions
      4. 2.1.4 Selection Switch Descriptions
        1. 2.1.4.1 S1 and S2 CFG Setting
      5. 2.1.5 Current Monitor and Current Limiter Configuration
        1. 2.1.5.1 Current Monitor Configuration
        2. 2.1.5.2 Current Limiter Configuration
  9. 3Implementation Results
    1. 3.1 Test Setup and Procedure
      1. 3.1.1 Test Setup
      2. 3.1.2 Test Procedure
      3. 3.1.3 Precautions
    2. 3.2 Test Data and Performance Curves
      1. 3.2.1 Thermal Performance
      2. 3.2.2 Efficiency
      3. 3.2.3 Steady State Waveforms
      4. 3.2.4 Step Load Response
      5. 3.2.5 AC Loop Response Curve
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

4.3 Bill of Materials

Table 4-1 Bill of Material

Designator

Quantity

Value

Description

PartNumber

Manufacturer

C1, C7, C26, C27, C28, C29, C31, C32

8

0.1uF

CAP, CERM, 0.1uF, 100V,+/- 10%, X7R, AEC-Q200 Grade 1, 0603

GCJ188R72A104KA01D

MuRata

C2, C3, C10, C11, C12, C14

6

10µF

10µF ±10% 100V Ceramic Capacitor X7R 1210 (3225 Metric)

C3225X7R2A106K250AC

TDK

C5, C13

2

100µF

100uF 100V 20% Aluminum Electrolytic Capacitors Radial, Can - SMD - 5000 Hrs @ 105°C

EMVY101ARA101MKE0S

United Chemi-Con

C17

1

47uF

CAP, CERM, 47uF, 6.3 V, +/- 20%, X5R, 0603

GRM188R60J476ME15D

MuRata

C18

1

0.082uF

CAP, CERM, 0.082uF, 16 V, +/- 10%, X7R, 0603

0603YC823KAT2A

AVX

C19

1

68pF

CAP, CERM, 68pF, 50 V, +/- 5%, C0G/NP0, 0603

C0603C680J5GACTU

Kemet

C20

1

0.18uF

CAP, CERM, 0.18uF, 25 V, +/- 10%, X7R, 0603

GRM188R71E184KA88D

MuRata

C21

1

180pF

CAP, CERM, 180pF, 50 V, +/- 5%, C0G/NP0, 0603

C0603C181J5GACTU

Kemet

C22, C23

2

680pF

CAP, CERM, 680pF, 50 V, +/- 1%, C0G/NP0, 0805

C0805C681F5GACTU

Kemet

C24, C25

2

0.1uF

CAP, CERM, 0.1µF, 50 V,+/- 10%, X7R, 0402

0402BB104KW500

Passive Plus

C39

1

1500pF

CAP, CERM, 1500pF, 100 V, +/- 10%, X7R, 0603

06031C152KAT2A

AVX

J1, J2, J3, J4

4

Standard Banana Jack, Uninsulated, 15A

108-0740-001

Cinch Connectivity

J5, J6

2

Header, 2.54 mm, 6x1, Gold, TH

61300611121

Wurth Elektronik

J7, J8, J9, J10

4

Header, 2.54 mm, 2x1, Gold, TH

61300211121

Wurth Elektronik

J11, JP1, JP2, JP3, JP5

5

Header, 2.54 mm, 3x1, Gold, TH

61300311121

Wurth Elektronik

JP4

1

Header, 2.54mm, 3x2, Gold, TH

HTSW-103-07-G-D

Samtec

JP6

1

Header, 2.54mm, 5x1, Gold, TH

61300511121

Wurth Elektronik

L1

1

22uH

Inductor, Shielded, Ferrite, 22uH, 18A, 0.00264ohm, SMD

7443642200

Wurth Elektronik

Q1, Q2, Q3, Q4

4

N-Channel 100V 44A (Tc) 2.5W (Ta), 52W (Tc) Surface Mount PG-TDSON-8-6

BSC146N10LS5ATMA1

Infineon

R1, R14

2

100k

RES, 100k, 1%, 0.1W, 0603

RC0603FR-07100KL

Yageo

R2

1

2.15k

RES, 2.15k, 1%, 0.1W, 0603

RC0603FR-072K15L

Yageo

R3, R4

2

12m

12mOhms ±1% 1.5W Chip Resistor Wide 1206 (3216 Metric), 0612 Automotive AEC-Q200, Current Sense Metal Foil

KRL3216E-C-R012-F-T5

Susumu

R6

1

9m

9mOhms ±1% 1W Chip Resistor Wide 0805 (2012 Metric), 0508 Automotive AEC-Q200, Current Sense Metal Foil

KRL2012E-M-R009-F-T5

Susumu

R7, R8, R9, R10

4

3

RES, 3.0, 5%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW06033R00JNEA

Vishay-Dale

R11, R12

2

10

RES, 10.0, 1%, 0.25W, AEC-Q200 Grade 0, 0603

CRCW060310R0FKEAHP

Vishay-Dale

R13, R39

2

3

RES, 3.0, 5%, 0.125W, AEC-Q200 Grade 0, 0805

CRCW08053R00JNEA

Vishay-Dale

R15

1

3.74k

RES, 3.74k, 1%, 0.1W, 0603

RC0603FR-073K74L

Yageo

R16

1

10.0k

RES, 10.0k, 0.1%, 0.1W, 0603

RT0603BRD0710KL

Yageo America

R17

1

30.0k

RES, 30.0k, 1%, 0.1W, 0603

RC0603FR-0730KL

Yageo

R18, R40, R41, R42, R43, R44, R46, R47, R48, R49, R50

11

0

RES, 0, 1%, 0.1W, AEC-Q200 Grade 0, 0603

RMCF0603ZT0R00

Stackpole Electronics Inc

R19

1

34.0k

RES, 34.0k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

ERJ-3EKF3402V

Panasonic

R20

1

180k

RES, 180k, 5%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW0603180KJNEA

Vishay-Dale

R21

1

78.7k

RES, 78.7k, 1%, 0.1W, 0603

RC0603FR-0778K7L

Yageo

R24

1

511

RES, 511, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW0603511RFKEA

Vishay-Dale

R25

1

1.15k

RES, 1.15k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW06031K15FKEA

Vishay-Dale

R26

1

1.87k

RES, 1.87k, 1%, 0.1W, 0603

RC0603FR-071K87L

Yageo

R27

1

2.70k

RES, 2.70k, 1%, 0.1W, 0603

RC0603FR-072K7L

Yageo

R28

1

3.83k

RES, 3.83k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW06033K83FKEA

Vishay-Dale

R29

1

5.10k

RES, 5.10k, 1%, 0.1W, 0603

RC0603FR-075K1L

Yageo

R30

1

6.49k

RES, 6.49k, 1%, 0.1W, 0603

RC0603FR-076K49L

Yageo

R31

1

8.25k

RES, 8.25k, 1%, 0.1W, 0603

RC0603FR-078K25L

Yageo

R32

1

10.5k

RES, 10.5k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW060310K5FKEA

Vishay-Dale

R33

1

13.3k

RES, 13.3k, 1%, 0.1W, 0603

RC0603FR-0713K3L

Yageo

R34

1

16.2k

RES, 16.2k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW060316K2FKEA

Vishay-Dale

R35

1

20.5k

RES, 20.5k, 1%, 0.1W, 0603

RC0603FR-0720K5L

Yageo

R36

1

24.9k

RES, 24.9k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW060324K9FKEA

Vishay-Dale

R37

1

30.1k

RES, 30.1k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW060330K1FKEA

Vishay-Dale

R38

1

35.7k

RES, 35.7k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW060335K7FKEA

Vishay-Dale

R45

1

10

RES, 10.0, 1%, 0.1W, 0603

RC0603FR-0710RL

Yageo

S1, S2

2

Switch, SPST, 8 Pos, 25mA, 24VDC, SMD

218-8LPST

CTS Electrocomponents

TP1

1

Test Point, Multipurpose, Red, TH

5010

Keystone Electronics

TP2, TP8

2

Test Point, Multipurpose, Orange, TH

5013

Keystone Electronics

TP3, TP4

2

Test Point, Multipurpose, Black, TH

5011

Keystone Electronics

TP5, TP6

2

Test Point, Multipurpose, White, TH

5012

Keystone Electronics

TP7

1

Test Point, Multipurpose, Grey, TH

5128

Keystone Electronics

TP9, TP10, TP11

3

Test Point, Miniature, Yellow, TH

5004

Keystone Electronics

U1

1

78V Wide VIN Bidirectional 4-Switch Buck-Boost Controller

LM51770DCPR

Texas Instruments

C4, C8, C9

0

10µF

10µF ±10% 100V Ceramic Capacitor X7R 1210 (3225 Metric)

C3225X7R2A106K250AC

TDK

C6, C15

0

100µF

100uF 100V 20% Aluminum Electrolytic Capacitors Radial, Can - SMD - 5000 Hrs @ 105°C

EMVY101ARA101MKE0S

United Chemi-Con

C16, C40

0

1500pF

CAP, CERM, 1500pF, 100V, +/- 10%, X7R, 0603

06031C152KAT2A

AVX

C30

0

0.1uF

CAP, CERM, 0.1µF, 50V,+/- 10%, X7R, 0402

0402BB104KW500

Passive Plus

C33

0

2200pF

CAP, CERM, 2200pF, 100V, +/- 5%, X7R, 0603

06031C222JAT2A

AVX

C34, C35, C36

0

1000pF

CAP, CERM, 1000pF, 100V, +/- 5%, X7R, 0603

06031C102JAT2A

AVX

C37, C44, C45

0

0.018uF

CAP, CERM, 0.018uF, 100V, +/- 10%, X7R, 0603

C0603C183K1RACTU

Kemet

C38

0

1500pF

CAP, CERM, 1500pF, 100V, +/- 10%, X7R, AEC-Q200 Grade 1, 0603

CGA3E2X7R2A152K080AA

TDK

C41, C42, C46

0

0.1uF

CAP, CERM, 0.1uF, 25V, +/- 10%, X7R, 0603

C0603X104K3RACTU

Kemet

C43

0

10uF

CAP, CERM, 10µF, 10V,+/- 10%, X5R, 0603

GRM188R61A106KE69D

MuRata

D1, D2

0

60V

Diode, Schottky, 60V, 5A, SMC

B560C-13-F

Diodes Inc.

D3, D4

0

60V

Diode, Schottky, 60V, 1A, SOD-323F

PMEG6010CEJ,115

Nexperia

D5

0

30V

Diode, Schottky, 30V, 0.2A, SOD-123

BAT54T1G

ON Semiconductor

J12, J13

0

Header, 2.54mm, 2x1, Gold, TH

61300211121

Wurth Elektronik

Q5

0

45 V

Transistor, PNP, 45V, 0.5A, AEC-Q101, SOT-23

BC807-40LT1G

ON Semiconductor

Q6

0

60V

MOSFET, N-CH, 60V, 0.115A, SOT-323

2N7002W-7-F

Diodes Inc.

R5

0

6m

6mOhms ±1% 1W Chip Resistor Wide 0805 (2012 Metric), 0508 Automotive AEC-Q200, Current Sense Metal Foil

KRL2012E-M-R006-F-T5

Susumu

R22, R66

0

2.15k

RES, 2.15k, 1%, 0.1W, 0603

RC0603FR-072K15L

Yageo

R23, R64, R80, R81

0

1.0k

RES, 1.0k, 5%, 0.1W, 0603

RC0603JR-071KL

Yageo

R51, R52, R63, R68, R79, R82

0

0

RES, 0, 1%, 0.1W, AEC-Q200 Grade 0, 0603

RMCF0603ZT0R00

Stackpole Electronics Inc

R53

0

100k

RES, 100k, 1%, 0.1W, 0603

RC0603FR-07100KL

Yageo

R54

0

4.70k

RES, 4.70k, 1%, 0.1W, 0603

RC0603FR-074K7L

Yageo

R55, R57, R71, R73, R74

0

10.0k

RES, 10.0k, 1%, 0.1W, AEC-Q200 Grade 0, 0603

CRCW060310K0FKEA

Vishay-Dale

R56, R58

0

10

RES, 10.0, 1%, 0.1W, 0603

RC0603FR-0710RL

Yageo

R59, R75

0

150k

RES, 150k, 1%, 0.1W, 0603

RC0603FR-07150KL

Yageo

R60, R65, R69, R70

0

10.0k

RES, 10.0k, 0.1%, 0.1W, 0603

RT0603BRD0710KL

Yageo America

R61, R62, R72, R76, R77, R78

0

47.5k

RES, 47.5k, 1%, 0.1W, 0603

RC0603FR-0747K5L

Yageo

R67

0

3.32k

RES, 3.32k, 1%, 0.1W, 0603

RC0603FR-073K32L

Yageo

R83

0

10kΩ

10kOhms 0.25W, 1/4W Gull Wing Surface Mount Trimmer Potentiometer Cermet 14.0 Turn Top Adjustment

ST-5ETW103

Nidec Copal Electronics

TP12, TP13, TP14, TP15

0

Test Point, Miniature, Yellow, TH

5004

Keystone Electronics

TP16, TP17

0

Test Point, Miniature, Black, TH

5001

Keystone Electronics

U2, U4

0

Low Voltage Adjustable Precision Shunt Regulator, 39ppm / degC, 15mA, -40 to 85degC, 3-pin SOT-23 (DBZ), Green (RoHS & no Sb/Br)

TLV431IDBZR

Texas Instruments

U3

0

Single low-voltage comparator with push-pull output 5-SC70 -40 to 125

TLV9030DCKR

Texas Instruments

U5

0

Single, 5.5V, 3MHz high-output-current (150mA) fast-shutdown (1μs) operational amplifier 5-SC70 -40 to 125

OPA310IDCKR

Texas Instruments